Violation of the isotropic-$\ell$ approximation in overdoped La_{2-x}Sr_xCuO_4

Abstract

Magnetotransport measurements on the overdoped cuprate La_{1.7}Sr_{0.3}CuO_4 are fitted using the Ong construction and band parameters inferred from angle-resolved photoemission. Within a band picture, the low temperature Hall data can only be fitted satisfactorily by invoking strong basal-plane anisotropy in the mean-free-path $\ell$. This violation of the isotropic-$\ell$ approximation supports a picture of dominant small-angle elastic scattering in cuprates due to out-of-plane substitutional disorder. We show that both band anisotropy and anisotropy in the elastic scattering channel strongly renormalize the Hall coefficient in overdoped La_{2-x}Sr_xCuO_4 over a wide doping and temperature range.

4 pages, 4 figures

References in corpus (8)

• Phenomenology of the normal state in-plane transport properties of high-$T_c$ cuprates
• The ground state of heavily-overdoped non-superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Anomalous Transport Phenomena in Fermi Liquids with Strong Magnetic Fluctuations
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• Strong charge fluctuations manifested in the high-temperature Hall coefficient of high-T_c cuprates
• Negative Hall coefficients of heavily overdoped La2-xSrxCuO4
• Angle dependent magnetoresistance measurements in Tl${}_2$Ba${}_2$CuO${}_{6+\delta }$ and the need for anisotropic scattering
• Small-angle scattering in a marginal Fermi-liquid

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